目前,我正在使用以下代码来拖动和移动未装饰的 JFrame。
private void initialiseGUI(Component component){
//<editor-fold defaultstate="collapsed" desc="code">
component.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
posX = e.getX();
posY = e.getY();
}
});
component.addMouseMotionListener(new MouseAdapter() {
public void mouseDragged(MouseEvent evt) {
//sets frame position when mouse dragged
Rectangle rectangle = getBounds();
getGUI().setBounds(evt.getXOnScreen() - posX, evt.getYOnScreen() - posY, rectangle.width, rectangle.height);
}
});
//</editor-fold>
}
我必须写什么,以便用户可以像装饰窗口一样通过拖动侧面来调整它的大小?
你可以看看 Rob Camick 先生的组件调整器 http://tips4java.wordpress.com/2009/09/13/resizing-components/班级。使用起来非常简单直接。
只需实例化ComponentResizer
并使用类似以下内容注册框架:
JFrame frame = new JFrame();
ComponentResizer cr = new ComponentResizer();
cr.registerComponent(frame);
cr.setSnapSize(new Dimension(10, 10));
cr.setMaximumSize(new Dimension(...));
cr.setMinimumSize(new Dimension(...));
这是使用该类的完整示例
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.LineBorder;
public class UndecoratedExample {
private JFrame frame = new JFrame();
class MainPanel extends JPanel {
public MainPanel() {
setBackground(Color.gray);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(400, 400);
}
}
class BorderPanel extends JPanel {
private JLabel label;
int pX, pY;
public BorderPanel() {
label = new JLabel(" X ");
label.setOpaque(true);
label.setBackground(Color.RED);
label.setForeground(Color.WHITE);
setBackground(Color.black);
setLayout(new FlowLayout(FlowLayout.RIGHT));
add(label);
label.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent e) {
System.exit(0);
}
});
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent me) {
// Get x,y and store them
pX = me.getX();
pY = me.getY();
}
public void mouseDragged(MouseEvent me) {
frame.setLocation(frame.getLocation().x + me.getX() - pX,
frame.getLocation().y + me.getY() - pY);
}
});
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent me) {
frame.setLocation(frame.getLocation().x + me.getX() - pX,
frame.getLocation().y + me.getY() - pY);
}
});
}
}
class OutsidePanel extends JPanel {
public OutsidePanel() {
setLayout(new BorderLayout());
add(new MainPanel(), BorderLayout.CENTER);
add(new BorderPanel(), BorderLayout.PAGE_START);
setBorder(new LineBorder(Color.BLACK, 5));
}
}
private void createAnsShowGui() {
ComponentResizer cr = new ComponentResizer();
cr.setMinimumSize(new Dimension(300, 300));
cr.setMaximumSize(new Dimension(800, 600));
cr.registerComponent(frame);
cr.setSnapSize(new Dimension(10, 10));
frame.setUndecorated(true);
frame.add(new OutsidePanel());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new UndecoratedExample().createAnsShowGui();
}
});
}
}
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